Explain why atomic radius decreases across a period
As you go along a period, there is an increasing number of protons in the nucleus of each atom meaning that the nucleus has an increasing positive charge.This means that the electrons are puller closer to the nucleus, decreasing the atomic radius.The electrons added across a period are added to the outer energy level so do not provide any shielding effect which would otherwise increase the atomic radius.
TD
Related Chemistry A Level answers
All answers ▸There are two methods of ionisation in a time of flight spectrometer, name and explain one of these methods in detail.
What's the difference between covalent and ionic bonding?
How do ionic charge and radius affect lattice enthalpy?
Why do the atomic radii of the elements decrease across a period on the periodic table.